by Allan Prior
[Starring] Frank Windsor Det. Chief Insp. Watt, Norman Bowler as Det.-Sgt. Hawkins, Peggy Sinclair as P/W Det.-Sgt. Allin
Agitators, criminals, anarchists any of these might have a purpose in acquiring illegal supplies of explosives. But Arthur Stanley Mellish is a mild-mannered, industrious, law-abiding citizen; conscientious in his work, circumspect in his private life. What reason could he have for wanting a quantity of gelignite?